Yieldable bobbin support for weft-replenishing looms



June 24,1930- w. H. KING 1,766,753

YIELDABLE BOBBIN SUPPORT FOR EFT REPLENISHING LOOKS Filed Dec. 3, 1928.ummlllllllnllllll||||||||||||l|||||||||||| .7

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Patented June 24, 1936 N TE A :PATENT'OFF-I'CEY WILLIAM H. KING, orcmnron. mAssAoiiusETr AssIGNoR TO cjRom'rroN -&

KNOWLES 1.00M :wonxs, or woacns'rnn, mssnonusnrrrs, .A coRronA'rIon orMASSACHUSETTS YIELDABLE 3013mm surron'r non wErr-nnrLENIsHxNG LooMsApplicatizinfilcd December 3,1928} Serial No. 323,542.

This invention relates to improvements ,in bOblJlIl supports for weftreplenishing looms and it is the general object of the invention toprovide a support which is yieldable in 5 all angular directions withresect to its axis and is so held as to beyiel able under action of a forceacting parallel to its axis and toward'its support.

In my co-pending applicationSer. No.

i 10 251,992, I have set forth-a coil spring bobbin support comprising asingle piece ofwire bent on itself to be substantially cylindrical inform with preferably a conical bobbin supporting tip. A support madeaccording to that application will yield in anyangular direction withrespect to the axis but no means are provided whereby the support as awhole may move alongits axis whenstruck by a misplaced bobbin. It is afurther object of my present invention to provide a holder through whichthe support may slide, said holder having a bore or bearingportion whichserves asia sliding guide for the coils of the spring. i

The support, being formed. of. a coil spring, tends normally to :assumea position with its axis'substantially straight and if deformed willexert a force tending to straighten its axis. This fact'I make use of byrequiring a deformation in the normal axis of the spring when the lattermoves to abnormal osition-and relying upon the tendency of the spring tostraighten its axis to restore'the bobbin support :to normal position A'more specific object of my present invention is to provide a "pivoted:member which will act'to cause a deformation in the normal axis of thespring support when the latter is actedupon by a force parallelto' theaxis.

Another b]eCt of-my invention is to probbbbin near its t p vide meansfor adjusting thepivoted means and also the stop for thespring supportso that the I latter may be given 1a plurality. of positions in each ofwhich it will act by its own tendency to straightenits axis to return tonormal position whenadeformed.

With these and other objects in; view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth in the claims.

In the. accompanying drawings wherein I have shown a convenientembodiment of-my invention,

Fig. 1- shows a portion of a multicolor weft, replenishing mechanismwith my invention appliedthereto,

Fig. 2 is a diagonal rear elevation lookingjn the direction of arrow 2,Fig. 1,

ig. 3 is an-enlarged vertical section on line 31 3 of Fig. 2, i

4 is a transverse of Fig.3, and I Fig. 5 is a View similar to Fig. 3 butshowing a modified form of the invention. -Referring to Fig. 1 it willbe seen thatI have provided a loom frame mounted a foot 11 of amulticolor magazine M; The latter is provided with atransferrer arm 12which maybe actuated in'any approved manner and said magazlne isprovidedwith a plurality of guideways 13 Whichdirect bobbins'toward transferposition. i

PV The magazine incorporates in its construction several tie rods thelowerjrear one of which is indicated at 14. It is to be understood thatthere are ordinarily four separate andindependent supports to hold abobbin in transfer position in a multicolor weft 're plenishingmechanism ofthis usual type, two of'these supports being for the frontside of the bobbin, one at each end, the other two beingfor the backofthe bobbin, one at each end. While it is possible that all four ofthesesupports may be made according to my present invention yet for thepurposes of illustrationI have shown but one, namely,

forjthe back of the magazine to support the The rear tie rod 14 hasmounted thereon a holder which is. held in longitudinally and angular-1yadjusted position with respect to the tie rod by means of a screw 21.Said holder has a bearing portion 22 provided with a bore 23shownparticularly in Fig. 3. -ASShOWD in the latter figure the upperporjsection on line 4-4 on which is r tion of the rear end of said boreis rounded as at 24 for a purpose to be described.

Said holder is provided with a threaded hole 25 preferably parallel tothe bore 23 and said hole 25 receives a screw 26 which is formed withahead 27. The latter has extending transversely therethrough a pin 28which may be held in position by a cotter pin 29 on one side and a head30 on the other side. A wall 31- is formed as shownin Fig. 3 and ispositioned to engage a web 32 formed as part, of a pivoting member 33.

As shown inFig. 2 said pivoting member is provided with spaced ears 3 Lthrough which the pin 28 extends to pivotally connect the head andmember. Theweb 32 is so positioned that it will engage the wall 31normally as. shown in Fig. 3. ,;The lower end of the pivoting-member 33is provided with aholding bar 36 formed preferably as an integral partof the pivoting member 33.

The bobbin support 37 isformed in a coil spring as clearly set forthinFigs. 1 and 3, the coils being, closely wound together, the upper coilbeing formed as an eye 38 which may embrace the part of the holding bar36. The lower end of the spring 37 may be provided with :a bobbinengaging tip39 to cooperate with other bobbin 'supports to hold thebobbin in proper position for transfer. As shown clearly in Fig. 3 saidtip .may be provided with an upper threaded portion 40 whichis threadedinto the lower end of the spring and clamped by the-coils of the latter.The coil spring 37 may be substantially the same as that shown inmyaforesaid co-vpending application.

- The spring is madeito fit snugly in, the

bore 23, being proportioned. to slide through the latter when requiredto do so, but having a tight enough fit with said bore so that thebobbin tip 39 will be placed correctly to hold the bobbin in properposition.-

The'parts are so proportioned that under normal conditions the rearupper end of the coil spring will be held slightly out of alignment withthe forward or lower portion of -the'.spring dueto the action of theholding bar '36 and the eye 38.- Under normal conditions the stresssetup by this slight deformation of the axis of the spring will be foundsuificienttohold the bobbin support in theposition shown in Fig. 3.

In operation, during a normal transfer the bobbin B will be depressedbythe transferrer arm 12 and will cause a downward deflection of thespring.=37 to permit the bobbin to pass into the shuttle not shown. Itoccasionally happens,however that a bobbin will be misplacedwith'respect to the shuttle due possibly to an improper transferand asthe lay moves rearwardly the bobbin will'project upwardly soas .toengage the bobbinsupport. WVhen this happens it is desirable to providesome form of yielding connection which will prevent breakage of thebobbin or support. This yielding is accomplished by my presentinvention, the support moving to the dotted linefposition shown iniFig.1 when subjected to an endwise pressure exerted toward the holder.

It will be seen from the dotted lines that the pivoted member 33-swingsaround the pin 28 as an axis, moving the holding bar in a directiontransverse with respect to the normal axis of the spring 37', therebysetting up in the spring stresses which later will "seek to returnthespring to its normal position. \Vhenthe bobbin passes out ofengagement-with thesupport so that the latter isnot acted uponby the layor any other force tendingto hold the same in its abnormal position, thestress set up in the spring will tend to move the latter in a directionto relieve thestress, namely, back to the normal position. This movementwill be limited by engagement of the web 32 withthe wall 31. Byreference to the coils of the spring shown in dotted lines in Fig. 1 it.will be seen that the lower portions of the coils are spaced, increasingthelength oftheucenter line of the spring,and their natural tendency tomove together. to

shorten the center line of the spring is thought to be the reasonwhythe; spring returns to the normal position: shown in full ,linesinFig. 1. The return movement of thespring to its normal position isfacilitated by the rounded surface 2 L located on that portion of thebore 23 which is adjacent. the pivot around which the eye 38 swings.

I From time to time it becomes desirable to adjust the position; of. thetip 39' and this adjustment may lee-effected by moving, the screw 26either into or out of the threaded hole.25,the adjustment being securedby a check nut 50.. p

vIn the modified form of the invention shown in Fig. 5 theconstructionwis substantially the same as that found in the pre ferredform except that the adjustable feature is omitted. The holder maybesupported onthe tie rod l t and held in adjusted position by screw 61..A bore 62 similar to. bore 23 extendsthrough the. holder and the springsupport 63 is proportioned to have snug but sliding fit with the bore62.

The rear eye '64. formed from one ot the coilsofthe spring projectsbeyond the bearing 65 of the holder so as to receive the lower end ofalink 66 pivoted to the holder at being to causethe'rear end ofthe'spring63 to start a rapid upwardmovement as soon macaw as, end pressure isexerted onthe bobbin sup porting tip of the spring. As in the preferredform it is believed that the inherent resilience of thespring whichtends normally to straighten the axis of said'spring is the force whichserves to restore the sup port toits normal position aftermovementtoabnormal positioniby a misplacedbobbin.

Experienceshows that if the spring berestore the spring to normalposition.

Fromthe foregoing 1t"\villbe"seen that lhave provided a very simpleformof coil spring bobbin support'which will not only yield in all,angular directions withrespect agin to its axis to accommodate propermovements of the bobbin, but will also .move longitudinally along itsaxis when engaged .by a misplaced bobbin and at the sametime bedeflected so asto set up a stresswhich w ill lateract to restore thespring tdits normal, position by. a reverse movement along its, axis.

7 It will also beiseerii that longitudinal movement 'offthe springisefffected without the useof fadditional[sprin s or weights; Itwilliurtherbe seen thatfft 1e end of the support opposite the bobbinenaway to deform its axis. when subject to an abnormal longitudinalpressure, and that these means set up stresseswhich are responsible forthereturn of the support to its normal position;

Having thus described my invention it will be apparent that changes andmodifications may, be made therein 1 those Skilled 'in the artwithoutdeparting 1 mm the spirit andfsc op'e'of the invention and I do not wishto be limited to the details herein disclosed,

but what I claim a 1 'In a weft ireplenishing mechanism; a substantially cylindrical inherently resilient bobbin support movable, as a 'unitalong its axis and resisting a bending of the axis thereof, meanstocause a bendingof said su'pportwhen the latter ismoved longitiidinallyalong its axis, and means cooperating withithe bent part of the supportto assist the support by the inherent resilience there not "to restorethe .axis of the supportto normaL- T v f ,2.In a weft replenishingmechanism, a substantially cylindrical inherently resilient end of thespring is acted upon in bobbin. support a fixed holder through which thesupport may slide, and means acting to eiiect-benjding-pf theisupportwith respeetto theholder when said supportis subjected e to an abnormallongitudinal movement, said holderand bent portion-0f the supportcooperating to restore thereupport' to normal position: z

3. In a weft replenishing mechanism, a

fixed-holder having a boreextendingthere through, an inherentlyresilient bobbin support extending through and slidable inthe bore andhaving an axis which isno-rmally of given form, and means, acting onsaid support when the latten isanoved relatively to i the. bore by anflabnormal force to cause the] axis of the support ElLQQ aSSUHIQ some formother than the given form to set upja stress in said-support wlnch willcooperate.

with the holder totend to return the support tonormal position." a I 4.In a-weft replenishiigw'rn fixed holderrhavinga bore extending there-,through, a coil spring bobbin, support having a substantially strai-ghtaxisextending through the here, said support I being slidable throughsaid bore, and a connectionbetween the spring and the holderqto cause abending of the axis ofthe spring when the support is subjected to anabnormal, endwise; movement through the. bore, thus setting up stressesin, the spring to cause the latter to cooperate with the holderto, tendto move ithe supportto normal position.\ I

v 5.5In a weft replenishing mechanism, a 3.. fixedholder-having a boreextending therethrough, -,a ,:co i-l spring bobbin support extendinthrough ;,l3h8 ib016, a linksupported the olderiand pivotally movablewith respect to the latter and having engagement 1 with the spring,*saidspring-being movable through the-bore of the holder to cause pivr ota lmovement of the link and the latter act n toide'flect the axisofthe'spring 6. n a weftreplenishing mechanism,- a

echanism ;a

a i 11 .fixed holder having a bore extending therethrough, :an elongatedinherently resilient bobbin {support I slidably. ,mounted through i thebore", and: a link interposed 3 between the holder land the support 1and aetingpalwhen 1 said? support is i subjected-to .abnormal'endwisemovement to deflect the normal axis of said support;- and thereby setupa stress iwhich-telrds'to return thesupport'to normal "position. I L

fixed holdenehaving a bore extending therethrough, an! elongated}inherently resilient bobbin support located'inand 'slidablewith respectto thefbore, a link operatively connected' ;tothe: support, and ,meanscapable of assuming a plurality-of positions with. respect to the holderand having pivotal icbnnection with the link, said link acting to p a I;-12o' In WW9? p gmechanism, a V

bore, and means efl'ect deformation of the axis of the support whenthelatter moves through. the bore.

8. In a weft replenishing mechanism, a fixed holder having a boreextending therethrough, an elongated inherently resilient bobbin supportlocated in and slidable with respect to the bore, a link operativelyconnected to the support, and means capable of assuming a plurality ofpositions with respect to the holder and having pivotal=connection withthe link, said link acting to effect deformation of the axis of thesupport when the latter moves through the bore, said means being movablewith respect to the holder in a direction parallel to the bore. 9. In aweft replenishing mechanism, a fixed holder having a bore extendingtherethrough, a screw movable in the holder in a direction substantiallyparallel to the bore, anelongated inherently resilient bobbin supportextending through and slidable with respect to the bore, and'a linkoperatively connecting the support and screw-and acting to causeadeformation of the normal axis of the elongated support when the lattermoves longitudinally through the bore. 7

10. In a weft replenishing mechanism, a fixed holder having a boreextending therethrough', a screw normally stationary but movable in theholder in a direction substantially parallel to the bore, anelongatedinherently resilient bobbin'support extending through and slidable withrespect to the bore, a link operatively connecting the support and screwand acting to cause a deformation of the normal axis of the elongatedsupport when the latter moves longitudinally through "the bore,and meansto limit movement of the link and support in' one direction. x

11. A bobbin support for a weft replenishing loom including a holderhaving a bore therethrough, a'coil spring bobbin support slidable in andextending through the I connecting the support to the holder to causethe support to move away'from the axis of the bore when movedlongitudinally through the bore. i:

' l2; A bobbin" support fora weft replenishinghloom comprisinga holderhaving a bore therethrough, an inherently "resilient elongated bobbinsupport slidable in and extending through the bore, and means to causemovement ofa portion ofthe support away from the axis of the bore as the-sup-' port moves longitudinally through the bore.

=13. In a bobbin support for a weft replenishing loom, a holder, aninherently re-, silient bobbin support movable through the holder, andmeans to cause the inherent 'resilience of the support to act to returnsaid support to normal position when moved to abnormalposition throughthe holder.

14; Ina weft replenishing mechanism, a

coil springbobbin support normally in position to assist in supporting abobbin, means to cause a deflection of the axis of the supportsimultaneously with a longitudinal motion thereof,-thereby setting up astress in the support, and fixed means form when the support moves'lonitudinallyalongsaid axis away from bo bin supporting position, andadditional means to deform the flexible portion so that thecorresponding part of the axis is of a form other than the given form,thereby setting up a stress in theflexible portion, the means andadditional means ooacting with the flexible portion when the latter isunder stress to returnthe flexible'portio n and axis thereof to normalwhenthe support is free to return tion. v

16. In a weft replenishing mechanism, a bobbin support, a portionthereof being resilient and normally having a given form, said supporthavingan axis along whichit may move longitudinally, means topreservetheoriginal .formof part of the support when the support movesalong its axis, and a device cooperating with the means to deflectanother part of the support when'said support has a longitudinal tonormal bobbin supporting posimovemntand tending to setup a stress in thesupport to return the same to normal position. 7 r

17. In a bobbin holder for a weft replenishing loom, a bobbinsupport-having a resilient portion and movable as a whole away frombobbin supporting position,a member acting onthat end of the supportopposite thebobbin engaging end, a pivotfor said element located atfonei side; of the axis of the support, aguide rto engage a portionofthe support between the bobbin vengaging end andthe element. and locatedon that side ofthe axis of the pivot said guide assisting in determiningthe motion of the support away from bobbin supporting position, and.asecond guide located on that side ofthe iaxis of the support oppositethepivot and located between'the first guide and the bobbin engagingend'of the support, said support when moving away from bobbin supportingposition having a portionofthe *axis thereof determined by said guidesand having-anthe support adjacent other part of the axis deflected bysaid pivoted element to produce a stress in the resilient portion ofsaid element tending to restore the latter to normal bobbin supportingposition.

In'testimony whereof I have hereunto affixed my signature.

WILLIAM H. KING.

